Bacteria grow best when optimal amounts of nutrients are provided. We first marked the spot on the slide where the sample will be placed. Also another factor that affects growth is the nutritional medium.
Probiotic bacteria provide positive health effects to the host. Cereus bacteria would be gram-negative since they cause food poisoning. We changed the water in the beakers during this time.
We removed the excess iodine from the slide and rinsed it in each of the beakers of fresh water. Hire Writer Another group of pathogenic enteric bacteria are members of the genus Salmonella. The third environment was the bottom of the shoe of one of our group members. Powered by Create your own unique website with customizable templates.
For example, Introduction to prokaryotes lab report body is covered in bacteria that eat the dead skin and there are also bacteria living inside of you giving you vitamins. We each swabbed different areas, the bottom of our shoes and the light switch. To make sure that the bacteria was loosened from the environment and stuck on o the swab, the swab was dipped in the sterile water immediately before taking the sample.
Tables and Figures How to cite this page Choose cite format: The microorganisms are called the inoculum. Most of the strains used in the classroom either require oxygen or growth or grow better with oxygen.
There were 3 distinct bacterial colonies in the agar plates created after hand washing compared to 4 bacterial colonies on the agar plates inoculated with unwashed hands.
We also learned about and applied the aseptic technique to prevent contamination. We next rolled the swab of bacteria onto one quadrant of the agar. Many people are unaware of the impact that bacteria has on our everyday lives.
Had the plates been left open during inoculation, bacteria present in the air and other surfaces could have contaminated the culture producing incorrect experimental data. Finally we blotted the slide dry, being careful not to rub the smear off of the slide.
Cereus bacteria samples, we found that they were both gram-negative bacteria. Most are unicellular, but some species live temperately or permanently in colonies.
Procedure One - Pure Culture and Transfer Techniques In the laboratory, transferring a bacteria population of microorganisms to a growth medium petri dishis referred to as inoculation.
The sixth environment was the spacer on the keyboard of the laboratory computer. One was a pale yellow and the other was white. Powered by Create your own unique website with customizable templates. Both agar plates were sealed with Parafilm to prevent contamination. We predicted that at least one would be gram-negative and both would be of different morphology.
Procedure Three - Gram Staining 1. First, we gently rubbed one fingertip in a sterilized agar plate using caution to avoid contamination from the air while the lid was open. Also it includes the prevention of contamination of the bacteria culture by other organisms.
This explains the horrible effects of food poisoning that these two bacterium can have on a human. Three of the Petri dishes had medium bacteria diversity and regular growth- the frame of the chalkboard, the stair railing handle from the stairwell, and the spacer of the keyboard Table 1.
Sterile water and sterile swabs are used to sample the bacteria from the environment. We labeled the bottom because the tops of the dishes could be switched and the petri dishes are often stored upside down to prevent condensation from forming in the sample.Introduction There are two different types of cells, prokaryotes and eukaryotes.
Prokaryotes, such as bacteria, lack a nuclear membrane and other membrane bound organelles.
Their genetic material consists of a single molecule of singular DNA. This lab report is worth 50 points towards your final lab grade.
Also, per the Honor Code. Prokaryotic and Eukaryotic Cells; Part 1: Animation; Introduction: All living things are made of cells which can be classified as prokaryotic or eukaryotic. Prokaryotic cells are classified by such features as lacking membrane-bound organelles and having circular DNA.
Eukaryotic cells contain membrane-bound organelles and have DNA. Bacteria Lab Report Introduction & Hypothesis Bacteria are a specific kind of prokaryotic organisms that are very versatile and can survive in a wide range of environments. Lab Report 1 Basic Types of Living Cells.
PRACTICAL 1: BASIC TYPES OF LIVING CELLS Introduction All living things are composed from a monomer called killarney10mile.com are 2 types of cells which are known as prokaryote and eukaryote killarney10mile.comyotic cells are the first living known organism have much simple structure.
Post-lab Questions 1. Lab 1. Introduction to Microscopy and the Cell Introduction - Observe and distinguish the cellular characteristics of prokaryotes and eukaryotes Microscope Parts - When you first get to lab: Learn the various parts of the microscope (pg Figure 1).
UNKNOW BACTERIA LAB REPORT UNKNOWN 36 Introduction The purpose of this lab was to identify two unknown bacteria from a mixed culture. The reason for identification of unknown bacteria was to help students recognize different bacteria through different biochemical tests and characteristics.Download